US1686211A

US1686211A - Roll-film control

Info

Publication number: US1686211A
Application number: US114930A
Authority: US
Inventors: Samuel M Hershberg
Original assignee: Individual
Current assignee: Individual
Priority date: 1926-06-10
Filing date: 1926-06-10
Publication date: 1928-10-02
Anticipated expiration: 1945-10-02

Description

Oct. 2, 1928. 1,686,211

5. M. HERSH BERG ROLL FILM CONTROL Filed June 10, 1926 Swuewto; 5A MUEL MHms/mnm 3391 115 @lbt a I Patented Oct. 2, 1928.

UNITED sures PATENT ,oFFi-cE;

' SAMUEL I. BE BSHFBEBG, F BBQOKLYN, NEW YORK.

ROLL-FILM CONTROL.

"Application filed June 10, sae. Serial No. 114,930.

The object of the present invention is to I provide a camera adapted for photographic reproduction work, and particularly of that type in which the camera box supports a .negative-holderbelow a lamp and the negative image is projected through a lens. and

- means operablefrom a trated in the drawings comprises a camera upona sensitized sheet for printing thereon.

,The invention relates more particularly to means for controlling a film bearing a plurality of'negatives and for supporting and actuating the film to bring the negatives successively into register with the lens by the arrows;

Figure 4 is an enlarged plan view,partlyin section of the negative holder;

Figure 5 is aside elevationof the same; Figure 6 is an enlarged side elevat1on of the ratchet and pawl device for actuating the take-up spool of the negative holder.

The embodiment of the invention illus supporting unit A and the camera assembly B.v The camera is adjustable bodily toward and from the sensitized sheet upon which the a negative image is to be projected andprinted, and the means for this purpose 1s carjecting In 7 to which is connected a cab I the cable be the lens housin ried by and operable'from the supporting 'unit' A. At the top of supporting unit A is a shaft 1 carrying a lar e pulley 2 and pulleys 3.- Attac ed at 4 to the a small pulley 3 and is connected to a counter-balance weight 6. ,The lam -hous-- ing 6 is provided with a, rearward y roing led over one of' the small pulleys3 and thence extends downward to a small drum 9 on a shaft 10, the latter being rotatable through hand wheel .11. De pending from the camera box is a bellowsa supporting a lens frame 12 which carrles 13,. To lens housing 13 is connected a ca 1e 14 led over a pulley 15 point exterior of the a ratchet wheel 29, the .to the shaft.

and bracket arm 16, the cable extending upwardly and over one of the small pulleys I 3 and thence being led downwardly to a relativelylarge drum 17 on shaft 10.

Drums 9 and 17 have spirally formed surfaces, that is to say the path of travelof the cable as it is wound, upon either drum changes in diameter, the arrangement being such .that t-he'bellows and camera may be lowered simultaneously, but the bellows has a greater speed, and hence a greaterdegree or movement than the camera casing.- The said mechanism forms part of the subject of a co-pending application Serial N o. 114,- 928, filed June 10, 1926, and is not specifically claimed here. In order to maintain adprstment, a tooth wheel 18 is carried by shaft 10 cxteriorly of supporting unit A and a pawl 19 is carried by the unit and engages the teeth of thewheel.

Within the camera casing and in register with the lens is a negative rack 20 adapted to receive a negative holder 21. Negative holder 21 ,is provided with any suitable means foiremovably supporting the supply spool 22 and the take-up spool 23. Rotataof the negative holder ble within a boss 24 is the flattened end of a shaft 25 which is adapted to fit within a slot in one end of the negative spool 23 in accordance with the customary practice. Freely rotatable upon shaft; 25 is a drum 26, drum 26 being provided with a pawl 27 which is'lightly pressed by spring 28 into contact with the teeth of wheel being fixed A spiral spring 30 is dis osed within drum 26, one end of the spring being connected to the drum and the other end to a member (1.

,Wound upon drum 26'is. a cable 31 which is led over guide pulleys 32, 32 and thence is connected to the end of. a lever 33 fulcrumed at 34 upon an arm 35, Lever 33 is adapted to be held in any position to which it is movedby'pawl 36 which may be released. by the hand operated device 37,the

pawl engaging a ratchet38. A slot 44 right, cable 31 will be pulled out to rotate drum 26 and wind in a film F onto spool 23 from the supply spool 22. In its movements the film is guided by the small rollers 39, and shields 40 are carried by the negative holder. adjacent the spools to further aid in maintaining the proper position of the film.

It will be noted that the negative rack 20 has several divisions and is adapted to support vignettes, etc. in one division and a plate or other form of negative in a preceding division. The camera box in the front of the negative rack is formed with an opening 41 for access to the film rack, the opening being normally closed by cover plate 42.

It will be understood that the length of movement imparted to the film F will be proportionate to the length of travel of the cable 31. This length of travel-will be controlled by the operative length of movement of the lever 33, which movement will be increased with the length'of the individual negatives on the film F. 7

Having described my invention, it will be understood that various modifications may be made in the embodiment illustrated inthe drawings, what I claim and desire to secure by Letters Patent being as follows 1. In a camera, a casing, a bellows depend-. ing from the casing, a lens carried by the bellows, means for simultaneously adjusting the position of the lens and casing, a

negative rack within the casing, a negative holder held insaid rack and adapted to support a supply and a take-up spool for a negative film, means operable exteriorly of the casing for imparting successive movements to the take-up spool, and a guide forming a redetermined limit of movement for said latter means, said predetermined limit of movement corresponding to the length of negative to be exposed so that successive lengths of negative may be actuated into exposed position by the actuation of said latter means.

- 2. In a camera of the character described, a'camera casing, a negative holder insaid casin comprising'supporting means for a supp y spool and a take-up spool, said means including a rotatable shaft, a ratchet wheel on the shaft, a drum rotatable about the shaft and having a pawl connecting the ratchet wheel, a cable wound about the drum, means exterior of the camera casing for imparting successive movements to the cable, and a guide forming a predetermined limit of movement for said latter means, said predetermined limit of movement corresponding to the length of negative to be exposed so that successive lengths of negative may be actuated into exposed position by the actuation of saidlatter means.

3. A camera comprising a casing, a bellows, a lens carried by the bellows, and

means for simultaneously adjusting the positions of the casing and lens, a negative rack in the casing, and a negative holder comprising supporting means for a supply and a take-up spool, said means including a shaft, a rotatable drum, means intermediate the drumand shaft for rotating the latter upon rotation of the drum in a given direction, a spring for returning the drum to initial position after an operative movement, a cable for rotating the drum, and a guide forming a predetermined limit of movement for said'cable, said predetermined limit-of movement corresponding to the lengths of negative to be exposed so that successive lengths of negative may be actuated into exposed position by the actuation ofsaid cable.

4. A negative holder comprising a frame formed withparallel side flanges, means carried by said flanges for supporting su ly and take-up spools, said means includifi g a rotatable shaft for the take-up spool, a d um' surrounding the shaft, means interme ate the drum and the shaft for rotating the latter upon movement of the drum in a g'ven direction, a spring within the drum for moving it to initial position after an o erative movement, a lever, a cable on the rum for rotating thelatter and connected to said lever, a guide forming a predetermined limit of movement for said lever, said predetermined limit of movement corresponding to the lengthof negative to be exposed so that successive lengths of negative may be actuated into exposed osition by the actuation of said lever, a rate et, and a pawl associated with said lever and cooperating with said ratchet to facilitate anchoring the lever upon the completion of partial movements of said lever.

5. In a device of the character described,

a camera casing and a negative holder disposed in said casing, said holder provided e member for actuating the take-up spool, said member] having operative and inoperative movements, a spring for effecting the inoperative movement of said rotatable member, 'a-cable for' effecting the operative movement/of the ro-. "tatable member, a lever exteriorly of the camera casing for imparting successive movements tothe cable, a. guide forming a predetermined limit of movement for said lever, said predetermined limit of movement correspondin to the length of negative to be exposed so th' t successive lengths of negative may be actuated into exposed position by the actuation of said lever, a ratchet, and apawl associated with said lever and cooperating SAMUEL ii.- HERSHBERG.

IIIOVG- with said ratchet to facilitate anchorll'ng the